The construction and assembly works for the building of a sewerage near Varna include:
- House outdoor sewerage system works - excavation by hand for sewerage, excavation by hand for pipes from the pumps to the connection point to sewarage pipes PEVP Ф110, excavating by hand for the modul station of the pumps, trenching for revision shaft, backfill with sand under, aroung and above the pipes, including shaping around pipes, backfill soil and compact under and above modul station and revision shaft, inspection shaft and above pipes, levelling the area, supply and fit of various types of pipes, toggle, threeway fitting, pipe ring, flange, autocontrol airpressure, stop valve with protection fitting, support block, supply and installation of 2 sewerage pumps;
- Rain and underground water works - excavating by hand for the rain water sewarage, excavation by hand for the revision shaft, supply and fit sewarage pipes Ф160, drill a hole in the concrete wall with a size of Ф200, supply and fit a revision shaft, its base size DN 630 and Н - 1,5м, backfil with sand and compact under, around and above pipes, backfill with soil and compact under and around modul station and revision shaft, levelling the area.
The construction and mounting works near Varna begin with manual excavation for sewage. Thick sewer pipes and inspection shafts are installed. Excavations for reservoirs and modular stations are being prepared. One of the tanks and the connections to it are installed.